Best perks for guests in an STR?

[Nathan Crankfield]

We recently launched our short-term rental on Airbnb here in South Denver. Because I had recently had a family party at the house, I had some surplus sodas and other little snacks leftover. We decided to stock the mini fridge with just a few drinks for the guests. We also provide them with filtered drinking water since the Englewood water tastes so bad. 

I'm curious as to what, if anything, other hosts leave for guests? I've heard from some that it's best to not leave anything, while I know some like to leave some local treats for people to try. What have you seen be successful? Is it worth it to provide little things like that or should you just focus on the necessities?